脱式计算. 8.82×15-100 15.8-[7/18]+14.2-[11/18] 21.6-0.8×4÷0.8×4

脱式计算.
8.82×15-100 15.8-[7/18]+14.2-[11/18] 21.6-0.8×4÷0.8×4
3[3/5]×3.7+3.6+5.3×3[3/5] 2.5×4.4 (1.5+2[2/3])÷3.75-[2/3].
russle 1年前 已收到1个回答 举报

你丫闭嘴123 春芽

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(1)8.82×15-100
=132.3-100
=32.3;
(2)15.8-[7/18]+14.2-[11/18]
=(15.8+14.2)-([7/18]+[11/18])
=30-1
=29;
(3)21.6-0.8×4÷0.8×4
=21.6-3.2÷0.8×4
=21.6-4×4
=21.6-16
=5.6;
(4)3[3/5]×3.7+3.6+5.3×3[3/5]
=3[3/5]×3.7+3[3/5]×1+5.3×3[3/5]
=3[3/5]×(3.7+1+5.3)
=3[3/5]×10
=36;
(5)2.5×4.4
=2.5×(4+0.4)
=2.5×4+2.5×0.4
=10+1
=11;
(6)(1.5+2[2/3])÷3.75-[2/3]
=[25/6]÷3.75-[2/3]
=[25/6]×[4/15]-[2/3]
=[10/9]-[2/3]
=[4/9].

1年前

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