计算. 306×5= 576÷8= 814÷4=验算 (60+80)÷7 894-60×3 6×29×5

计算. 306×5= 576÷8= 814÷4=验算 (60+80)÷7 894-60×3 6×29×5.

306×5=1530;

576÷8=72;

814÷4=203…2;
                                                                                  
(60+80)÷7,
=140÷7,
=20;
894-60×3,
=894-180,
=714;

6×29×5,
=29×(6×5),
=29×30,
=870.
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