3 运动定律与简便运算
0.89×0.48+0.89×0.52 0.25×13.7×0.4 4.2×101
3.6×99 2.5×32×1.25 0.125×88
56.5×99+56.5 (1.25﹣0.125)×8 45÷0.09÷0.5
17.8÷(1.78×4)
计算下面各题(能简算的要简算).
①4×0.8×2.5×12.5 ②÷[1﹣(+)] ③(2.8+3.85÷3.5)×4.6
④6.5×1.83+0.17×6.5 ⑤(+)×8+ ⑥÷[×(0.4+)].
计算,能用简算的要简算.
0.85×101
5.29÷2.3﹣0.1×01
0.28÷35
8﹣4.68÷4.5×(0.25+0.5)
2.5×1.25×32
25.7×3.29+6.71×25.7.
计算
(1)8.01+99×8.01
(2)125×(8+0.8+0.08+0.008)
(3)++++
(4)(0.4+)÷(﹣0.75)×0.5
(5)989898×999999÷10101÷111111.
用简便方法计算.
①7.28﹣(0.8+3.28) ②73.8﹣1.64﹣13.8 ③13.25+5.82+6.75+4.18
④12.7﹣4.8﹣5.2 ⑤3.1+25.78+6.9 ⑥9.7+10.3﹣6.7.
脱式计算(能简算的要简算)
2.4×1.5+3.6×1.5 0.125×2.5×8 7.38﹣5.14+3.62﹣2.86
17.2﹣7.2×0.6 8.9×9.9 41.9﹣2.08﹣7.92.
能简算则简算.
2.5×6.6×0.4 (9.87+9.87+9.87+9.87)×25 16.7×0.4+15.5
1.96×0.57+1.96×0.43 6.75+23.4÷7.2 0.65×201.
下列各题怎样简便就怎样算.
3.7×1.4×0.05 72×0.81+10.4 1.4×25+3.45
1.5×102 1.25×0.7×0.8 2.7×3.7+0.37×73
8.7×99 0.8×(12.5﹣1.25) 1.25×0.4×80×2.5.
脱式计算:(能用简便方法就用简便方法)
15.64﹣2.53﹣7.47;
3.7+6.3÷0.6﹣0.4;
3.5÷〔(0.45﹣0.38)×0.1〕;
5.6×7.2+4.4×7.2.
脱式计算(能简算的要简算)
2.5×1.37×0.4 4.8×0.25 0.89×4.8+0.89×5.2
101×0.78 8.8×1.25 4.3×0.8×5.
(能简算的用简算)
(1)3.72﹣(1.72+1.3) (2)208×7.3﹣20.8×63 (3)15×888+32×0.125×0.25
(4)+﹣ (5)+++ (6)﹣(﹣)
怎样算简便就怎样算.
6.71×0.52+4.8×0.671 2.5×(3.5﹣1.65)×0.4 102×4.5
6.25÷1.25÷0.8 8.3﹣2.63+2.73×1.5.
脱式计算.
96÷(15.4﹣12.2) 9÷[0.3×(8﹣6.5)] 0.175÷0.25÷0.4
0.175÷0.25×4 0.36÷[(6.1﹣4.6)×0.8] 3.6×0.4+1.2×5.
怎样简便怎样算.
(1)2.04+1.96﹣0.35 (2)20.78﹣5.4﹣4.6 (3)25×32×125
(4)8.2×99+8.2 (5)4×4.78×0.25 (6)0.65×99
(7)21.36÷08﹣12.9 (8)1.2×2.5+0.8×2.5 (9)102×0.45.
算一算,能简算的要简算.
(1)5.42×99 (2)1.43×2.5+0.57×2.5
(3)0.93÷0.6÷0.5 (4)6.8×25+0.32×4.2﹣8÷25.
10.4+0.6×0.8 (18.7+1.3)×1.4 1.5×2.06﹣0.06
1.7×4.9+4.9×8.3 39.6﹣9.6÷3 1.2×103
下面各题怎样算简便就怎样算.
(1)27.3+73.2+72.7 (2)43.25﹣10.4﹣3.25 (3)3.8+1.37+6.2+12.63
(4)76.8﹣27.4﹣12.6 (5)5.85+1.89﹣2.85 (6)3.9+0.1﹣3.9+0.1.
计算下面各题,能简算的要简算.第①②小题列竖式计算并验算.
①356﹣35.6= ②1502÷51= ③45÷[72×(﹣)]
④1.9﹣17.86÷9.4+19 ⑤25×32×125 ⑥9.63﹣(3.63+0.98)
计算下面各题,能用简便算法的用简便算法
0.25×1.2+2.8×0.25 0.65×101 67.8﹣7.8×4.9
3.2×1.25×2.5 0.8×(2.5×0.125) 16.8÷40÷0.25.
递等式计算,能简算的要简算,并写出主要计算过程.
①45.6÷2.5÷0.4 ②13.45÷0.5﹣7.9 ③2.4×101 ④3.9×2.5÷15.
计算下面各题,注意使用简便算法.
①0.36+9.6÷3.2 ②3.2×5.7+6.8×5.7
③25×6.8×0.04 ④3.75÷〔0.3×(1.34﹣0.84)〕
用喜欢的方法计算下面各题.
6.2×2.1﹣2.1 5.12+2.54+4.88
12.5×17.8×0.8 9.9×2.5
9.4×5.8+10.6×5.8 12.5×0.4×2.5×8.
用递等式计算(能简算的要简算)
6.2×9.9 3.5×0.7+5.5×0.7+0.7 0.125×3.2×0.25
0.8×(12.5﹣1.25) 44.1÷3.5﹣7.5 18.36÷3.6×1.2
87.84÷1.6÷6.1.