2026年知行合暑假衔接计算天天练五升六第24页答案
① 单位换算。(每空1分,共8分)
0.48 L = (
480
)mL
613 mL = (
0.613
)L
500 cm³ = (
0.5
)dm³ = (
0.5
)L
3400 cm² = (
0.34
)m²
2000 dm² = (
20
)m²
7.82 L = (
7
)dm³(
820
)cm³

答案

0.48 L = 480 mL
613 mL = 0.613 L
500 cm³ = 0.5 dm³ = 0.5 L
3400 cm² = 0.34 m²
2000 dm² = 20 m²
7.82 L = 7 dm³ 820 cm³
② 直接写出得数。(每题1分,共12分)
$3×0.4=$
$3.09+7.87=$
$7.24-1.54=$
$11.5+7.3=$
$9.2-8.1=$
$146.5-97.6=$
$1.5×30=$
$2.34×0.2=$
$1.6×0.5=$
$5.6+5.4=$
$11-3.6=$
$1.7+3.3×0.2=$

答案

$3×0.4=1.2$
$3.09+7.87=10.96$
$7.24-1.54=5.7$
$11.5+7.3=18.8$
$9.2-8.1=1.1$
$146.5-97.6=48.9$
$1.5×30=45$
$2.34×0.2=0.468$
$1.6×0.5=0.8$
$5.6+5.4=11$
$11-3.6=7.4$
$1.7+3.3×0.2=2.36$
③ 计算。(每题3分,共18分)
$(1.25+2.5)×8$
$12.78-(4.97+2.78)$
$(45.9-32.7)÷8÷0.125$
$12.5×0.4×2.5×8$
$73-4.2÷0.1$
$[9.1-(4.27-3.07)]×4.2$

答案

$(1.25+2.5)×8=30$
$12.78-(4.97+2.78)=5.03$
$(45.9-32.7)÷8÷0.125=13.2$
$12.5×0.4×2.5×8=100$
$73-4.2÷0.1=31$
$[9.1-(4.27-3.07)]×4.2=33.18$
④ 解方程。(每题4分,共12分)
$28.2 - x = 14.1$
$7x ÷ 3 = 28$
$2×(4.5 + x) = 13$

答案

解:$x = 14.1$
解:$x = 12$
解:$x = 2$