3.8×4.56+3.83×5.44怎样简便运算?
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![3.8×4.56+3.83×5.44怎样简便运算?](/uploads/image/z/18273-57-3.jpg?t=3.8%C3%974.56%2B3.83%C3%975.44%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%3F)
3.8×4.56+3.83×5.44怎样简便运算?
3.8×4.56+3.83×5.44怎样简便运算?
3.8×4.56+3.83×5.44怎样简便运算?
3.8 X 4.56 + 3.83 X 5.44
= 3.8 X 4.56 + (3.8 + 0.03) X 5.44
= 3.8 X 4.56 + 3.8 X 5.44 + 0.03 X 5.44
= 3.8 X (4.56 + 5.44) + 0.3 X 0.544
= 3.8 X 10 + 0.1632
= 38.1632
3.83×4.56+3.83×5.44
=
3.83×(4.56+5.44)
=3.83×10
=38.3
不懂可追问,有帮助请采纳,谢谢! 一个是(3.8)×4.56+3.83×5.44
还有一个是(3.83)×4.56+3.83×5.44一定是你题目出错了,不然没有简便方法没呀???????????????那只能这样了 3...
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3.83×4.56+3.83×5.44
=
3.83×(4.56+5.44)
=3.83×10
=38.3
不懂可追问,有帮助请采纳,谢谢!
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主要是看出4.56+5.44=10这点,然后从这里出发
3.8×4.56+3.83×5.44
=3.8×4.56+(3.8+0.03)×5.44
=3.8x(4.56+5.44)+0.03*5.44
=38+0.1632=38.1632
应该是这样:3.8 X 4.56 + 3.83 X 5.44
= 3.8 X 4.56 + (3.8 + 0.03) X 5.44
= 3.8 X 4.56 + 3.8 X 5.44 + 0.03 X 5.44
= 3.8 X (4.56 + 5.44) + 0.3 X 0.544
= 3.8 X 10 + 0.1632
= 38.1632