Question

用简便方法计算 99.9*7.8+33.3*6.6

Answer 1

用简便方法计算 99.9*7.8+33.3*6.6

99.9*7.8+33.3*6.6=99.9*7.8+33.3*(2.2*3)=99.9*7.8+99.9*2.2=99.9*(7.8+2.2)=99.9*10=999

99.9×7.8+33.3×6.6用简便方法怎么计算

99.9×7.8+33.3×6.6
=33.3×3×7.8+33.3×6.6
=33.3×23.4+33.3×6.6
=33.3×(23.4+6.6)
=33.3×30
=999

99.9*788+33.3*666用简便计算方法计算结果

99.9*788+33.3*666
=99.9*788+33.3*3*222
=99.9*788+99.9*222
=99.9*(788+222)
=99.9*1000
=9900

99.9х101–99.9用简便方法计算

99.9х101–99.9简便计算
=99.9x(101一1)
=99.9x100
=9990

6.6×1 1.85-6.6×0.85用简便方法怎么计算

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=6.6×（11.85-0.85）
=6.6×11
=6.6×（10+1）
=66+6.6
=72.6

6.6×1.85-6.6×1 0.85用简便方法怎么计算

6.6×1.85-6.6×1 0.85用简便方法怎么计算
=6.6×（1.85-10.85）
=6.6×（-9）
=59.4

99.9*0.222+33.3*0.334怎么简便计算

99.9*0.222+33.3*0.334
=33.3*（3*0.222）+33.3*0.334
=33.3*（0.666+0.334）
=33.3*1
=33.3
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99.9×0.78 用简便方法计算

99.9×0.78
=（100-0.1）×0.78
=100×0.78-0.1×0.78
=78-0.078
=77.922

用简便方法计算：99.9×222

解
=(100-0.1)*222
=100*222-0.1*222
=22200-22.2
=22177.8