P6 Maths (10 marks)

1. 10 1/2 ＋ 3 4/5 － 1 5/6 ＝ ?

Sol:

10 1/2 ＋ 3 4/5 － 1 5/6

＝ 21/2 ＋ 19/5 － 11/6

＝ 315/30 ＋ 114/30 － 55/30

＝ 374/30

＝ 187/15 ( 12 7/15 )

Ans: 187/15 ( 12 7/15 )

2. 5 5/6 × 2 1/5 ＝ ?

Sol:

5 5/6 × 2 1/5

＝ 35/6 × 11/5

＝ 77/6 ( 12 5/6 )

Ans: 77/6 ( 12 5/6 )

3. If I buy 6 boxes of apple or 8 bottles of coke need the same money,

each bottle of coke need $4.2, then each box of apple need how much

money?

Sol:

4.2 × 8 ÷ 6

＝ 33.6 ÷ 6

＝ 5.6

Ans: $5.6

4. 48 3/10 ＋ 8 2/5 ＝ ?

Sol:

48 3/10 ＋ 8 2/5

＝ 483/10 ＋ 42/5

＝ 483/10 ＋ 84/10

＝ 567/10 ( 56 7/10 )

Ans: 567/10 ( 56 7/10 )

5. 28 4/5 ÷ 2 2/5 ＝ ?

Sol:

28 4/5 ÷ 2 2/5

＝ 144/5 ÷ 12/5

＝ 144/5 × 5/12

＝ 12

Ans: 12

the ans is 12