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一、口算。
$0.36÷6=$
$5.1÷1.7=$
$1.9-0.85=$
$1.8÷30=$
$0.42×3=$
$1.5+0.83=$
$2.5×400=$
$92÷4=$
$0.36÷6=$
0.06
$1.6×0.5=$0.8
$0.6÷(0.3+0.5)=$0.75
$5.1÷1.7=$
3
$3.75×0.2=$0.75
$16-4.5+5.5=$17
$1.9-0.85=$
1.05
$0.42+2.6=$3.02
$4×1.2×2.5=$12
$1.8÷30=$
0.06
$232×3=$696
$13-(0.5+4)=$8.5
$0.42×3=$
1.26
$1.75÷0.25=$7
$8-12.4÷4=$4.9
$1.5+0.83=$
2.33
$0.7-0.54=$0.16
$1.2×(0.8+0.4)=$1.44
$2.5×400=$
1000
$125÷1000=$0.125
$6÷(0.5×20)=$0.6
$92÷4=$
23
$8-2.5=$5.5
$3.75+3.75×9=$37.5
答案
一、0.06 0.8 0.75
3 0.75 17
1.05 3.02 12
0.06 696 8.5
1.26 7 4.9
2.33 0.16 1.44
1000 0.125 0.6
23 5.5 37.5
3 0.75 17
1.05 3.02 12
0.06 696 8.5
1.26 7 4.9
2.33 0.16 1.44
1000 0.125 0.6
23 5.5 37.5
二、计算下面各题，怎样简便就怎样计算。
$7.04-3.47-0.53$ $19.8÷(26.8-1.6×3)$ $5.8×2.7+0.58×73$
$470÷(47÷2÷5)$ $4.2-8×0.21×1.25$ $(6.02+2.82)÷4-2.05$
$7.04-3.47-0.53$ $19.8÷(26.8-1.6×3)$ $5.8×2.7+0.58×73$
$470÷(47÷2÷5)$ $4.2-8×0.21×1.25$ $(6.02+2.82)÷4-2.05$
答案
1.原式=7.04-(3.47+0.53)=3.04
2.原式=19.8÷22=0.9
3.原式=5.8×(2.7+7.3)=58
4.原式=470÷4.7=100
5.原式=4.2-2.1=2.1
6.原式=2.21-2.05=0.16
2.原式=19.8÷22=0.9
3.原式=5.8×(2.7+7.3)=58
4.原式=470÷4.7=100
5.原式=4.2-2.1=2.1
6.原式=2.21-2.05=0.16
