Question

口算： 5.5×2=	9.6÷4.8=2	3-1.5×2=	2×3.1=	2.4×0.5=
0.125×8-0．1=	0.48÷6=	6.4-4=	0.6÷3+3=	0.91÷13=
3.25+0.75=	9.9-0.9÷0.1=	17×40=	100-63=	3.2+1.68=
4.8÷8=	0.5+0.5÷0.5=	50×0.8=	0.99÷33=0.03	4×7.5×2.5=
4.5×0.1=	2.4÷0.8=	（2.7-2.7）×3.5=	1.3×7=	2÷0.4=
2.1×40÷10=	2.8×0.4=	14-7.4=	1.92÷0.04=	0.4×0.8=
0.58+0.26=	1.4×6=	6.4÷4=	4.98+0.62=	1.7-0.47=
5-0.05=	2.5×3=	3÷0.25=	0.32×500=	0.65+4.35=
10-5.4=	4÷20=	3.5×200=	1.5-0.06=	0.75÷15=
5.5×2=	4×0.25=	0.36+1.54=	1.01×99=	420÷35=
25×12=	135÷0.5=	0.51÷17=	32.8+19=	5.2÷1.3=
1.6×0.4=	4.9×0.7=	1÷5=	6÷12=	0.87-0.49=

Answer 1

考點(diǎn)：小數(shù)乘法,小數(shù)的加法和減法,小數(shù)除法

專題：運(yùn)算順序及法則

分析：根據(jù)四則運(yùn)算的計(jì)算法則進(jìn)行計(jì)算即可求解．注意4×7.5×2.5根據(jù)乘法交換律和結(jié)合律簡便計(jì)算．

解答： 解：

5.5×2=11	9.6÷4.8=2	3-1.5×2=0	2×3.1=6.2	2.4×0.5=1.2
0.125×8-0.1=0.9	0.48÷6=0.08	6.4-4=2.4	0.6÷3+3=3.2	0.91÷13=0.07
3.25+0.75=4	9.9-0.9÷0.1=0.9	17×40=680	100-63=37	3.2+1.68=4.88
4.8÷8=0.6	0.5+0.5÷0.5=1.5	50×0.8=40	0.99÷33=0.03	4×7.5×2.5=75
4.5×0.1=0.45	2.4÷0.8=3	（2.7-2.7）×3.5=0	1.3×7=9.1	2÷0.4=5
2.1×40÷10=8.4	2.8×0.4=1.12	14-7.4=6.6	1.92÷0.04=48	0.4×0.8=0.32
0.58+0.26=0.84	1.4×6=8.4	6.4÷4=1.6	4.98+0.62=5.6	1.7-0.47=1.23
5-0.05=4.95	2.5×3=7.5	3÷0.25=12	0.32×500=160	0.65+4.35=5
10-5.4=4.6	4÷20=0.2	3.5×200=700	1.5-0.06=1.44	0.75÷15=0.05
5.5×2=11	4×0.25=1	0.36+1.54=1.9	1.01×99=99.99	420÷35=12
25×12=300	135÷0.5=270	0.51÷17=0.03	32.8+19=51.8	5.2÷1.3=4
1.6×0.4=0.64	4.9×0.7=3.43	1÷5=0.2	6÷12=0.5	0.87-0.49=0.38

點(diǎn)評(píng)：考查了四則運(yùn)算，關(guān)鍵是熟練掌握計(jì)算法則正確進(jìn)行計(jì)算．