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一、口算。
$169÷1.3=$
$14.8+2.2=$
$2.4×40=$
$1-0.02=$
$2.52÷0.4=$
$3.6÷0.09=$
$0.21×0.3=$
$8.2÷0.01=$
$169÷1.3=$
130
$55-5.5=$49.5
$6.6÷0.3=$22
$14.8+2.2=$
17
$2.6×0.3=$0.78
$14.6+24=$38.6
$2.4×40=$
96
$9.7-6.9=$2.8
$3.26÷0.2=$16.3
$1-0.02=$
0.98
$0.12×0.7=$0.084
$10.8÷0.36=$30
$2.52÷0.4=$
6.3
$0.2×60=$12
$0.4÷0.8=$0.5
$3.6÷0.09=$
40
$200×0.04=$8
$14.7÷0.7=$21
$0.21×0.3=$
0.063
$2.5-1.37=$1.13
$12.1÷11=$1.1
$8.2÷0.01=$
820
$3.4+4.6=$8
$0.72÷2.4=$0.3
答案
一、130 49.5 22 17 0.78 38.6 96 2.8 16.3 0.98 0.084 30 6.3 12 0.5 40 8 21 0.063 1.13 1.1 820 8 0.3
二、计算下面各题,怎样简便就怎样计算。
$13.5+(21.5÷2.5-0.09)$ $[10.4+(5.2+4.8)]×2.1$
$5.4×0.56+5.6×0.46$ $0.96+11.87+5.04-3.87$
$13.5+(21.5÷2.5-0.09)$ $[10.4+(5.2+4.8)]×2.1$
$5.4×0.56+5.6×0.46$ $0.96+11.87+5.04-3.87$
答案
二、22.01 42.84 5.6 14
解析
13.5+(21.5÷2.5-0.09)
=13.5+(8.6-0.09)
=13.5+8.51
=22.01
[10.4+(5.2+4.8)]×2.1
=[10.4+10]×2.1
=20.4×2.1
=42.84
5.4×0.56+5.6×0.46
=5.4×0.56+0.56×4.6
=(5.4+4.6)×0.56
=10×0.56
=5.6
0.96+11.87+5.04-3.87
=(0.96+5.04)+(11.87-3.87)
=6+8
=14
=13.5+(8.6-0.09)
=13.5+8.51
=22.01
[10.4+(5.2+4.8)]×2.1
=[10.4+10]×2.1
=20.4×2.1
=42.84
5.4×0.56+5.6×0.46
=5.4×0.56+0.56×4.6
=(5.4+4.6)×0.56
=10×0.56
=5.6
0.96+11.87+5.04-3.87
=(0.96+5.04)+(11.87-3.87)
=6+8
=14
