脱式计算.840÷4÷7 (200+402)÷765×(788-768)(359+247)÷3.
第1个回答 推荐于2016-05-04
(1)840÷4÷7
=210÷7
=30;
(2)(200+402)÷7
=602÷7
=86;
(3)65×(788-768)
=65×20
=1300;
(4)(359+247)÷3
=606÷3
=202.本回答被提问者采纳
=210÷7
=30;
(2)(200+402)÷7
=602÷7
=86;
(3)65×(788-768)
=65×20
=1300;
(4)(359+247)÷3
=606÷3
=202.本回答被提问者采纳