FOURTH - SIXTH GRADE Simple Math

Solve : 37 x 20

• 58

• 78

• 740

Answer explanation

First take 37 and ask yourself. What is 37 multiply by 2? The answer is probably 74. But you see 20 is just 2 x 10, so it means you multiply 37 x 2 x 10 and this becomes 74 x 10. Any number multiplied by 10 is just that number and a zero ex; 5x10=5 and 0 which is 50... So the answer hear becomes 740. Ask where you don't understand.

Work out: 1111 - 999

• 211

• 112

• 121

Answer explanation

Since 1111 has its leading place value to be thousands and 999 hundreds, it's possible to subtract these numbers but take care.

1111 - 999(borrow 1 from the tens side to make the tens digit 0 and the ones side (10+1=11) why? Because we can't subtract 9 from 1. 11-9=2

Next, we go to the tens digit which remained 0, we borrow 1 from the hundreds digit leaving it to be 0 while the tens(10+0) =10, 10-9=1 and so on.... Our answer at last becomes 112.

Ulternatevely, you can as well ask yourself a question how many steps can you move from 999 to 1111? From 999 to 1000 is 1 and from 1000 to 1111 is 111, then you add 111+1=112

38 / 9

(/ Means divide)

• 4 rem 4

• 4 rem 3

• 4 rem 2

• 3 rem 11

Answer explanation

Use your multiplication table to find out how many times 9 goes into 38. You will see that 36=9x4 but 9x5=45 which is more that 38, so 38 is between 36 and 45. Then, you subtract 36 from 38 you get 2. Therefore, the answer becomes 4 rem 2.

361 + 639

• 100

• 990

• 1000

Answer explanation

Add 9 +1 = 10 write 0 carry 1

Add 3 + 6 = 9 plus the 1 you carried becomes 10, write 0 carry 1

Add 6 + 3 = 9 plus the 1 you carried becomes 10,write 10 since that is the last arithmetic. So, the answer becomes, 1000

State the place value and total value of digit 6 in the number 76231

• Place value: Thousands...... Total value: 6000

• Place value: Thousands........ Total value: 600

• Place value: Tens of thousands..... Total value: 60000

Write in symbols/numbers : THREE HUNDRED AND FIFTY SEVEN THOUSAND SEVEN HUNDRED AND SEVENTEEN

• 35717

• 357717

• 375717

What is the value of 7 + 7?

• XIV

• 15

• XXIV

• XVI

What is the value of V + IX

• 14

• 15

• 24

• VIX