1 算一算。
$14.4-13.5=$
$7.5÷5+12.3=$
$2×6+8×6=$
$27÷3.6=$
$14.7÷(3.2+1.7)=$
$(40-35)÷1.25=$
$7.84+2.76=$
$4.85×2+4.7=$
$910÷7×5=$
$14.4-13.5=$
$7.5÷5+12.3=$
$2×6+8×6=$
$27÷3.6=$
$14.7÷(3.2+1.7)=$
$(40-35)÷1.25=$
$7.84+2.76=$
$4.85×2+4.7=$
$910÷7×5=$
答案:
0.9;13.8;60;7.5;3;4;10.6;14.4;650
解析:
- $14.4-13.5=0.9$;
- $7.5÷5+12.3=1.5+12.3=13.8$;
- $2×6+8×6=6×(2+8)=60$;
- $27÷3.6=7.5$;
- $14.7÷(3.2+1.7)=14.7÷4.9=3$;
- $(40-35)÷1.25=5÷1.25=4$;
- $7.84+2.76=10.6$;
- $4.85×2+4.7=9.7+4.7=14.4$;
- $910÷7×5=130×5=650$。
解析:
- $14.4-13.5=0.9$;
- $7.5÷5+12.3=1.5+12.3=13.8$;
- $2×6+8×6=6×(2+8)=60$;
- $27÷3.6=7.5$;
- $14.7÷(3.2+1.7)=14.7÷4.9=3$;
- $(40-35)÷1.25=5÷1.25=4$;
- $7.84+2.76=10.6$;
- $4.85×2+4.7=9.7+4.7=14.4$;
- $910÷7×5=130×5=650$。
2 列竖式计算。
$16.8÷4.2=$
$74.9÷7=$
$22.4÷3.5=$
$36.4÷14=$
$26.5÷53=$
$4.88÷6.1=$
$40.48÷4.4=$
$2.8÷0.04=$
$30.96÷0.4=$
$7.64÷4=$
$81÷18=$
$47.2÷59=$
$16.8÷4.2=$
$74.9÷7=$
$22.4÷3.5=$
$36.4÷14=$
$26.5÷53=$
$4.88÷6.1=$
$40.48÷4.4=$
$2.8÷0.04=$
$30.96÷0.4=$
$7.64÷4=$
$81÷18=$
$47.2÷59=$
答案:
4;10.7;6.4;2.6;0.5;0.8;9.2;70;77.4;1.91;4.5;0.8
解析:
- $16.8÷4.2=4$;$74.9÷7=10.7$;$22.4÷3.5=6.4$;
- $36.4÷14=2.6$;$26.5÷53=0.5$;$4.88÷6.1=0.8$;
- $40.48÷4.4=9.2$;$2.8÷0.04=70$;$30.96÷0.4=77.4$;
- $7.64÷4=1.91$;$81÷18=4.5$;$47.2÷59=0.8$。(竖式略,按小数除法法则计算)
解析:
- $16.8÷4.2=4$;$74.9÷7=10.7$;$22.4÷3.5=6.4$;
- $36.4÷14=2.6$;$26.5÷53=0.5$;$4.88÷6.1=0.8$;
- $40.48÷4.4=9.2$;$2.8÷0.04=70$;$30.96÷0.4=77.4$;
- $7.64÷4=1.91$;$81÷18=4.5$;$47.2÷59=0.8$。(竖式略,按小数除法法则计算)
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