www.3112.net > 计算下面各题 42÷28 7.2÷1.6+0.8 19.8÷3.3 2.5×3.6

计算下面各题 42÷28 7.2÷1.6+0.8 19.8÷3.3 2.5×3.6

1.5 5.3 6 9 26.1 8.1

(1)5.6+0.82+4.4+0.18=5.6+4.4+(0.18+0.82)=10+1=11;(

(1)657+360÷45×19,=657+8×19,=657+152,=809;(2)21×34÷

(1)6.73×4.8+5.2×6.73=(4.8+5.2)×6.73=10×6.73=67.3;(

①22.31÷12≈1.86; ②3.O6÷0.75=4.08; ③5.26÷1.6=3.287

(1)3.87+1.44-0.87+0.56=(3.87-0.87)+(1.44+0.56),=3+

(1)21.8-7.22-2.78=21.8-(7.22+2.78)=21.8-10=11.8   

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