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① 直接写出得数。(每题1分,共20分)
60+33=
987-456=
836+17=
234×7=
162×40=
180÷6=
96-47=
175+274=
579-23=
543×8=
273×50=
189÷9=
0.27+0.43=
125×8=
0.5+0.75=
0÷5+83=
74÷100=
7-2.8=
7.9×1000=
5.6÷10×100=
60+33=
987-456=
836+17=
234×7=
162×40=
180÷6=
96-47=
175+274=
579-23=
543×8=
273×50=
189÷9=
0.27+0.43=
125×8=
0.5+0.75=
0÷5+83=
74÷100=
7-2.8=
7.9×1000=
5.6÷10×100=
答案
1. 93、531、853、1638、6480、30、49、449、556、4344、13650、21、0.7、1000、1.25、83、0.74、4.2、7900、56
② 列竖式计算。(每题3分,共12分)
21.4 - 8.46 =
5.8 + 12.67 =
24.32 - 14.7 =
34.72 + 6.75 =
21.4 - 8.46 =
5.8 + 12.67 =
24.32 - 14.7 =
34.72 + 6.75 =
答案
2.竖式略
12.94 18.47 9.62 41.47
12.94 18.47 9.62 41.47
③ 计算下面各题,能简算的要简算。(每题3分,共18分)
$13.55+18.73+6.45$
$38.12-(18.12+3.5)$
$6.43+6.87+1.57+0.13$
$4.57-3.4+3.43-1.6$
$32.88-(2.88+7.12)$
$3.59+13.6+2.41+6.4$
$13.55+18.73+6.45$
$38.12-(18.12+3.5)$
$6.43+6.87+1.57+0.13$
$4.57-3.4+3.43-1.6$
$32.88-(2.88+7.12)$
$3.59+13.6+2.41+6.4$
答案
3. 38.73 16.5 15
3 22.88 26
3 22.88 26
