Question

20．口算．

531-102=	2.7×0.3=	399+176=	2.4÷0.6=	1-$\frac{3}{5}$=
4.35-2.6=	0.48÷4=	160+2.5=	101×35=	0.8×25-2=
10.8-6.4-2.6=	3700+621=	0÷0.38=	9.2×0.5×2=	7×0.3+0.7×7=

Answer 1

分析 根據(jù)整數(shù)的加法和減法以及小數(shù)加減乘除法的計(jì)算方法進(jìn)行計(jì)算．

解答

解： 531-102=429	2.7×0.3=0.81	399+176=575	2.4÷0.6=4	1-$\frac{3}{5}$=$\frac{2}{5}$
4.35-2.6=1.75	0.48÷4=0.12	160+2.5=162.5	101×35=3535	0.8×25-2=18
10.8-6.4-2.6=1.8	3700+621=4321	0÷0.38=0	9.2×0.5×2=9.2	7×0.3+0.7×7=7

點(diǎn)評(píng) 此題主要考查了學(xué)生整數(shù)的加法和減法以及小數(shù)加減乘除法的計(jì)算能力．