Question

36× 5 12 =	16×50=	0.66+0.4=	4 7 ×0×7=
0.9-40%=	1 6 - 1 7 =	4 7 × 49 32 =	1- 5 8 ÷62.5%=
2 3 + 1 6 =	7.5-7=	3 2 + 3 2 ÷ 3 2 =	1 8 -0.12=
4 5 ÷12=	1÷ 17 19 =	（ 3 7 + 3 28 ）×7=	1.43+2.9-4.3=
7.2-1 1 6 -2 5 6 =	0.25×1.36×4=	5 9 ×8÷ 5 9 ×8=	1÷100%×2013=

Answer 1

分析：根據(jù)分?jǐn)?shù)、整數(shù)、小數(shù)和百分?jǐn)?shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算；
（

3

7

+

3

28

）×7根據(jù)乘法分配律進(jìn)行簡算；
7.2-1

1

6

-2

5

6

根據(jù)減法的性質(zhì)進(jìn)行簡算；
0.25×1.36×4根據(jù)乘法交換律進(jìn)行簡算．

解答：解：

36× 5 12 =15	16×50=800	0.66+0.4=1.06	4 7 ×0×7=0
0.9-40%=0.5	1 6 - 1 7 = 1 42	4 7 × 49 32 = 7 8	1- 5 8 ÷62.5%=0
2 3 + 1 6 = 5 6	7.5-7=0.5	3 2 + 3 2 ÷ 3 2 =2.5	1 8 -0.12=0.005
4 5 ÷12= 1 15	1÷ 17 19 = 19 17	（ 3 7 + 3 28 ）×7=3 3 4	1.43+2.9-4.3=0.03
7.2-1 1 6 -2 5 6 =3.2	0.25×1.36×4=1.36	5 9 ×8÷ 5 9 ×8=64	1÷100%×2013=2013

點(diǎn)評：口算時(shí)，注意運(yùn)算符號和數(shù)據(jù)，然后再進(jìn)一步計(jì)算．