Question

12.64.53+8.42.47简便运算

Answer 1

12.64.53+8.42.47简便运算

12.6+4.53+8.4+2.47
=（12.6+8.4）+（4.53+2.47）
=21+7
=28

980147简便运算

980147不用计算了
98+147=100-2+150-3=250-5=245
98-147=100-2-150+3=-150+1=-149
98*147=(100-2)(150-3)=1500-300-300+6=1006

1235878简便运算

123-58+78
=123+（78-58）
=123+20
=143
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3.725简便运算

3.7÷25
＝（3.7×4）÷（25×4）
＝14.8÷100
＝0.148
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请点右下角“采纳答案”。

用简便运算

小学数学五年级上册简便计算练习1
请用简便方法计算下列各题
0.25×0.28 0.125×3.2×2.5 35×40.2
0.25×4÷0.25×4 3.5×9.9 3.5×99+3.5
3.5×101-3.5 3.5×9.9+3.5×0.1 3.5×2.7+35×0.73
3.5×2.7-3.5×0.7 (32+5.6)÷0.8 3.5÷0.6-0.5÷0.6
4.9÷3.5 7÷0.25÷4 7÷0.125 ÷8
7.35÷(7.35×0.25) 7.35÷(7.35÷0.25) 7.325-(5.325+1.7)
3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5
7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7)
3.29+0.73-2.29+2.27 3.29×0.25×4 0.125×8.8
63.4÷2.5÷0.4 4.9÷1.4 3.9÷（1.3×5）
（7.7＋1.54）÷0.7 2.5×2.4 2.7÷45
0.35×1.25×2×0.8 32.4×0.9＋0.1×32.4 15÷0.25
28.6×101－28.6 0.86×15.7－0.86×14.7 2.4×102
14－7.32－2.68 2.64＋8.67＋7.36＋11.33 2.31×1.2×0.5
（2.5－0.25）×0.4 9.16×1.5－0.5×9.16 3.6－3.6×0.5
7.6×0.8＋0.2×7.6 0.85×199 0.25×8.5×4
0.25×36 0.125×3.2×2.5 35×40.2

3333366666简便运算

33333×66666
=33333×3×22222
=99999×22222
=（100000-1）×22222
=100000×22222-1×22222
=2222200000-22222
=2222177778

5155515527302730简便运算

51555155+27302730
=5155×10001+2730×10001
=（5155+2730）×10001
=7885×10001
=7885×10000+7885×1
=78850000+7885
=78857885
51555155-27302730
=5155×10001-2730×10001
=（5155-2730）×10001
=2425×10001
=2425×10000+2425×1
=24250000+2425
=24252425

1999999999简便运算

298
解析：
199+99
=199+(100-1)
=(199+100)-1
=299-1
=298

3618151620简便运算

36+18+15+16+20
=40-4+20-2+20-5+20-4+20
=40+20+20+20+20-(4+2+5+4)
=120-15
=105

5.32416简便运算

5.3×24×16
二[5.3X(2o十4)]X16
二[106十21.6]×16
二127.6x16
=127.6(10+6)
二1276+765.6
二2041.6