Question

（2013?道里區模擬）口算

65+37×0=	28×0÷54=	4×28×25=	100×3÷100×3=
25×28=	50-25÷5=	2.7×0.03=	2.4÷0.06=
4.2÷3=	1×0.94=	1.2×0.8=	0.39÷1.3=
1- 8 9 =	1 8 + 7 8 =	1 4 - 1 9 =	1 4 + 1 6 =

Answer 1

分析：根據整數、分數加減乘除法的計算方法進行解答即可；
4×28×25運用乘法交換律簡算．

解答：解：

65+37×0=65	28×0÷54=0	4×28×25=2800	100×3÷100×3=9
25×28=700	50-25÷5=45	2.7×0.03=0.081	2.4÷0.06=40
4.2÷3=1.4	1×0.94=0.94	1.2×0.8=0.96	0.39÷1.3=0.3
1- 8 9 = 1 9	1 8 + 7 8 =1	1 4 - 1 9 = 5 36	1 4 + 1 6 = 5 12

點評：此題考查了整數、分數加減乘除法的口算能力，注意運算符號，認真計算即可．