7/5×2/5÷9/5,用脱式计算,能简算的要简算。
7/5×2/5÷9/5,用脱式计算,能简算的要简算。
7/5×2/5÷9/5
=14/25÷9/5
=14/45
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算一算(能简算的要简算):7/9/12/5+2/9*5/12=
7/9/12/5+2/9*5/12
=7/9*5/12+2/9*5/12
=5/12*(7/9+2/9)
=5/12*1
=5/12
计算,能简算的要简算:2/9-2/9*7/16
2/9-2/9×7/16
=2/9×(1-7/16)
=2/9×9/16
=1/8
脱式计算,能简算的要简算[160%一(5/2十40%)]亠2/1
[160%一(2/5十40%)]÷1/2
=[160%一0.8]÷1/2
=0.8÷1/2
=1.6
能用简算就简算 7/9/11/5+2/9*5/11
7/9/11/5+2/9*5/11
=7/9*5/11+2/9*5/11
=(7/9+2/9)*5/11
=5/11
5/9-2/11+4/9-9/11 脱式计算 能简算的要简算
5/9-2/11+4/9-9/11
=(5/9+4/9)-(2/11+9/11)
=9/9-11/11
=1-1
=0
2-6/13÷9/29-2/3,用脱式计算,能简算的要简算。
2-6/13÷9/29-2/3
解:根据约分和通分的运用,
原式=2-6/13÷9/29-2/3
=2-6/13x29/9-2/3
=2-58/39-2/3
=2-1-19/39-26/39
=1-45/39
=-6/39
=-2/13
计算下面各题,能简算的要简算 7/11÷【2/5-(1-7/16】
7/11÷【2/5-(1-7/16】
=7/11÷(2/5-9/16)
=7/11÷(-13/80)
=-7/11×80/13
=-560/143
能简算的简算 (2/7+2/5)×7/6-1/5= 2.8-2.8×64%+4.6=
1)原题= 1/3+7/15-1/5 = 9/15 = 3/5
2) 原题= 2.8×0.36 + 4.6 = 1.08-0.072+4.6 = 5.68-0.072 = 5.608
3) 原题= 1.8×(0.36+0.64) = 1.8
4) 原题= 4×1.25×5 = 25
5) 原题= (5+50)/5 = 11
三又2/5加上3/7加上3/5加上4/7能简算的,要简算脱式计算
=3+(2/5+3/5)+(3/7+4/7)
=3+1+1
=5