数学4.07×101怎样简便计算
4.07×101怎样简便计算还有0.4×63×2.5和2.6×7.8+2.2×2.6怎样简便计算...
4.07×101怎样简便计算还有0.4×63×2.5和2.6×7.8+2.2×2.6怎样简便计算
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4.07×101
=4.07×(100+1)
=4.07×100+4.07×1
=407+4.07
=411.07
0.4×63×2.5
=(0.4×2.5)×63
=1×63
=63
2.6×7.8+2.2×2.6
=2.6×(7.8+2.2)
=2.6×10
=26
=4.07×(100+1)
=4.07×100+4.07×1
=407+4.07
=411.07
0.4×63×2.5
=(0.4×2.5)×63
=1×63
=63
2.6×7.8+2.2×2.6
=2.6×(7.8+2.2)
=2.6×10
=26
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推荐于2016-02-09
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答案如下
4.07×101
=4.07×(100+1)
=4.07×100+4.07×1
=407+4.07
=411.07
0.4*63*2.5
=0.4×2.5×63
=1×63
=63
2.6×7.8+2.2×2.6
=2.6×(7.8+2.2)
26
4.07×101
=4.07×(100+1)
=4.07×100+4.07×1
=407+4.07
=411.07
0.4*63*2.5
=0.4×2.5×63
=1×63
=63
2.6×7.8+2.2×2.6
=2.6×(7.8+2.2)
26
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4.07*(100+1)=407+4.07=411.07
0.4×63×2.5=0.4*2.5*63=63
2.6×7.8+2.2×2.6=2.6*(7.8+2.2)=26
0.4×63×2.5=0.4*2.5*63=63
2.6×7.8+2.2×2.6=2.6*(7.8+2.2)=26
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4.07×(100+1)
=4.07×100+4.07
=407+4.07
=411.07
=4.07×100+4.07
=407+4.07
=411.07
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