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1 直接写出得数。(每题1分,共20分)
$89 - 31 = $ $321 + 456 = $ $432×4 = $ $550÷5 = $
$37 + 68 = $ $765 - 321 = $ $712 + 13 = $ $345×5 = $
$592×30 = $ $520÷4 = $ $234 + 345 = $ $968 - 42 = $
$175÷5 = $ $80×32 = $ $207 - 135 = $ $720÷40 = $
$6200÷1000 = $ $0.6×10 = $ $5.2×100 = $ $3.4×1000 = $
$89 - 31 = $ $321 + 456 = $ $432×4 = $ $550÷5 = $
$37 + 68 = $ $765 - 321 = $ $712 + 13 = $ $345×5 = $
$592×30 = $ $520÷4 = $ $234 + 345 = $ $968 - 42 = $
$175÷5 = $ $80×32 = $ $207 - 135 = $ $720÷40 = $
$6200÷1000 = $ $0.6×10 = $ $5.2×100 = $ $3.4×1000 = $
答案
58 777 1728 110
105 444 725 1725
17760 130 579 926
35 2560 72 18
6.2 6 520 3400
105 444 725 1725
17760 130 579 926
35 2560 72 18
6.2 6 520 3400
2 列竖式计算,带※的要验算。(每题3分,共12分)
$640÷90 = $ $736÷24 = $ ※$705÷56 = $ $247×35 = $
$640÷90 = $ $736÷24 = $ ※$705÷56 = $ $247×35 = $
答案
竖式及验算略
7……10 30……16
12……33 8645
7……10 30……16
12……33 8645
3 计算下面各题,能简算的要简算。(每题3分,共18分)
$4256 + 587 - 256$ $748 - 351 + 252 - 149$ $283 + 36 + 64 + 17 + 44$
$52×81 + 52×19$ $960÷[(18 - 6)×5]$ $(350 - 250)÷20×5$
$4256 + 587 - 256$ $748 - 351 + 252 - 149$ $283 + 36 + 64 + 17 + 44$
$52×81 + 52×19$ $960÷[(18 - 6)×5]$ $(350 - 250)÷20×5$
答案
4587 500 444
5200 16 25
5200 16 25
