小数简便运算练习题46.8—8.12+3.2-11.88

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小数简便运算练习题46.8—8.12+3.2-11.88小数简便运算练习题46.8—8.12+3.2-11.88小数简便运算练习题46.8—8.12+3.2-11.8846.8—8.12+3.2-11

小数简便运算练习题46.8—8.12+3.2-11.88
小数简便运算练习题46.8—8.12+3.2-11.88

小数简便运算练习题46.8—8.12+3.2-11.88
46.8—8.12+3.2-11.88
=(46.8+3.2)-(8.12+11.88)
=50-20
=30

46.8—8.12+3.2-11.88
=46.8+3.2-(8.12+11.88)
=50-20
=30

46.8—8.12+3.2-11.88
=46.8+32-(8.12+11.88)
=50-20
=30

=(46.8 3.2)-(8.12 11.88) =50-20 =30

46.8—8.12+3.2-11.88
=(46.8+3.2)-8.12-11.88采用变序法
=(46.8+3.2)-(8.12+11.88) 减法性质
=50-20
=30