How to subtract - SSAT Elementary Level Quantitative (Math)

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Question

$\dpi{100} 342-31=$

Answer

Write 342. Write 31 just below it, with the 3 under the 4, and the 1 under the 2. Now subtract straight down, starting on the right side.

$\dpi{100} 2-1=1$

$\dpi{100} 4-3=1$

$\dpi{100} 3-0=3$

Our answer is 311.

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Question

Place the following numbers in ascending order:

Answer

2 is less than 4, 4 is less than 11, and 11 is less than 12.

Note that ascending means increasing, not decreasing!

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Question

$\dpi{100} \frac{8}{9}-\frac{4}{9}=$

Answer

The bottom is the same in both fractions. This means that we can subtract straight across for the top numbers. The bottom number remains the same.

$\dpi{100} \frac{8}{9}-\frac{4}{9}= \frac{8-4}{9}=\frac{4}{9}$

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Question

Find the difference.

Answer

Subtract the ones , then the tens, then the hundres place. The difference is 414.

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Question

Max has 3 toy cars. Luke has 5 toy cars. How many more toy cars does Luke have than Max?

Answer

The term "how many more" is asking you to subtract. Since Luke has more toy cars than Max, put the greater number first. Then subtract the lesser number .

Luke has two more cars than Max.

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Question

Find the difference.

Answer

Line up the digits vertically. When subtracting the digits in the ones place, you will need to borrow a ten, so the 8 in the tens place becomes a 7 and the 1 in the ones place becomes 11. Now subtract the digits in the ones place . Now subtract the digits in the tens place . The difference is 55.

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Question

Subtract: $\frac{1}{2} - \frac{1}{5}$

Answer

Write both fractions in terms of the least common denominator, in this case 10:

$\frac{1}{2} - \frac{1}{5} = \frac{1\cdot 5}{2 \cdot 5} - \frac{1\cdot 2}{5\cdot 2} = \frac{5}{10} - \frac{2}{10}=\frac{5-2}{10}=\frac{3}{10}$

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Question

Derrick saw nine birds sitting on a tree branch. Three flew away. Then two more flew away. How many birds are on the tree branch now?

Answer

Subtract; start with nine birds. Three flew away: .

Six are left, then two more flew away: .

Four birds are left on the branch.

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Question

Find the difference between and .

Answer

To find the difference, you need to subtract. When subtracting, always remember to put the greater number first!

$\begin{matrix} &22 \ - & 14\ \end{matrix}$

When we try to subtract the ones place, we will need to cancel. For 22, the ones place becomes 12 and the tens place becomes 1.

$\begin{matrix} & \ 1\ 12\ - & 1\ 4\ & \ \ 8 \end{matrix}$

The difference between 14 and 22 is 8.

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Question

What number is in the hundredths place of

Answer

. The hundredths place is occupied by 7.

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Question

Answer

$\fn_cm \fn_cm Line;up;the;numbers;and;subtract;straight;down.$

$\fn_cm \underline{-;35}$

$0-5=not;positive\rightarrow ;borrow;a;1;from;the; 10;in;\underline{10}0.$

$9^{1}0$

$\fn_cm \underline{-;3, 5}$

$\fn_cm 6, 5$

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Question

Answer

$\underline{-;7}$

$3-7=not;positive\rightarrow ;borrow;a;1;from;the;2;in; \underline{2}3.$

$\fn_cm 1: ^{1}3$

$\fn_cm \underline{-;;;7}$

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Question

Answer

$\underline{-;19}$

$7-9=not;positive\rightarrow ;borrow;a;1;from;the; 8;in;\underline{8}7.$

$7: ^{1}7$

$\underline{-;1: 9}$

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Question

Answer

$\underline{-35;;;-35}$

$\underline{-;35}$

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Question

Answer

$\fn_cm \underline{-3;;;;-3}$

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Question

In 5 years, Eric will be 14 years old. How old is Eric now?

Answer

Subtract 5 from 14 to find Eric's current age: 14 - 5 = 9

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Question

Find the difference.

Answer

The correct answer is 127. In the ones column, in order to subtract 6 from 3 we must carry over a 1 from the 4. This changes our columns in 143 to 1 - 3 - 13. Now we can subtract 6 from 13 to get 7. Next we subtract 1 from 3 (remember it's 3 now not 4) to get 2 and finally subtract 0 from 1 to get 1. This gives us a final answer of 127.

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Question

Answer

Subtract 34 from 75 and you get 41.

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Question

Find the difference between 327 and 531.

Answer

To find the difference, you need to subtract. When subtracting, always remember to put the greater number first!

Line the numbers up vertically.

$\begin{matrix} &531 \ - & 327 \end{matrix}$

Subtract each column, starting with the ones place and moving to the left. You will need to cancel in order to subtract the ones.

The difference between 327 and 531 is 204.

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Question

Find the difference between 167 and 88.

Answer

To find the difference we need to subtract the smaller number form the bigger number.

To subtract the ones place, we will need to cancel.

Sine we cancelled, out tens place in 167 is now a 5. We will need to cancel again in order to subtract the tens.

Our final answer is 79.

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