P4 MATHS

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SAPMATP4_W48Page 1/4

Taken from Learning Maths Book 4B

Express each decimal in thousandths.

1. 28.404= thousandths

2. 40.687= thousandths

3. 53.936= thousandths

4. 2.308= thousandths

5. 66.799= thousandths

Solutions:

3. 53 936

53.936 = 53   936  _____ 1000   = 53 ones 936 thousandths

   = 53 936 thousandths

4. 2308

2.308 = 2   308  _____ 1000   = 2 ones 308 thousandths 

   = 2308 thousandths

5. 66 799

66.799 = 66   799  ___ 1000   = 66 ones 799 thousandths

   = 66 799 thousandths

2. 40 687

40.687 = 40   687  _____ 1000   = 40 ones 687 thousandths

   = 40 687 thousandths

28404

Revision: Decimals (Part 1)

P4 MATHS

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SAPMATP4_W48Page 2/4

Taken from Learning Maths Book 4B

Solutions:  1.3.45×     310.35

1 12. 0.78

×     97.02

7 73. 12.36

×     561.80

3 114. 50.12

×      2100.24

5. 21.55×      6129.30

3 3

Revision: Decimals (Part 2)

Multiply these decimals.

1. 3. 4 5 4. 5 0. 1 2 × 3 × 2

2. 0. 7 8 5. 2 1. 5 5

× 9 × 6

3. 1 2. 3 6 × 5

P4 MATHS

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SAPMATP4_W48Page 3/4

Taken from Learning Maths Book 4B

Revision: Decimals (Part 2)

Estimatethevalueofeachofthefollowingbyfirstroundingoffthenumbertothenearestwholenumber.Thendecodethemessageonthenextpage.

A 26.54+92.88=

C 84.05–77.13=

D 5.4×8=

E 11.99÷3=

I 125.09+68.01=

L 524.87–128.39=

M 44.19×5=

S 35.59÷6=

40 4 7 193 220 120 397 6

Solutions:  (A)26.54+92.88≈27+93=120

(C)84.05–77.13≈84–77=7(D)5.4×8≈5×8=40

(E)11.99÷3≈12÷3=4

(I)125.09+68.01≈125+68=193

(L)524.87–128.39≈525–128=397(M)44.19×5≈44×5=220

(S)35.59÷6≈36÷6=6

DECIMALS

P4 MATHS

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SAPMATP4_W48Page 4/4

Taken from Mental Mathematics Book 4

Do these sums mentally.

Do not reduce the answers to the lowest terms.

1. 28193+45197 =

2. 1__3 + 1__9 =

3. 173.15÷100 =

4. 1__4 – 1__5 =

5. 53×0.9 =

6. 73×77 =

7. 91×91 =

8. 100.36×10 =

9. 34×34 =

10. 13491–10599 =

Solutions: 1. 73 390 2.   4  __ 9   3. 1.7315 4.   1  ___ 

20   5. 47.7 6. 5621 7. 8281 8. 1003.6 9. 1156 10. 2892

Mental Maths: GENERAL REVISION 11