脱式计算: 42×15+136 800-981÷9 (125+275)÷8 25×(187-143) 392÷(45-38) (26+34)×78
脱式计算:42×15+136800-981÷9(125+275)÷825×(187-143)392÷(45-38)(26+34)×78150-90÷325×2×11....
脱式计算: 42×15+136 800-981÷9 (125+275)÷8 25×(187-143) 392÷(45-38) (26+34)×78 150-90÷3 25×2×11.
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(1)42×15+136,
=630+136,
=766;
(2)800-981÷9,
=800-109,
=691;
(3)(125+275)÷8,
=400÷8,
=50;
(4)25×(187-143),
=25×44,
=25×4×11,
=100×11,
=1100;
(5)392÷(45-38),
=392÷7,
=56;
(6)(26+34)×78,
=60×78,
=4680;
(7)150-90÷3,
=150-30,
=120;
(8)25×2×11,
=50×11,
=550.
=630+136,
=766;
(2)800-981÷9,
=800-109,
=691;
(3)(125+275)÷8,
=400÷8,
=50;
(4)25×(187-143),
=25×44,
=25×4×11,
=100×11,
=1100;
(5)392÷(45-38),
=392÷7,
=56;
(6)(26+34)×78,
=60×78,
=4680;
(7)150-90÷3,
=150-30,
=120;
(8)25×2×11,
=50×11,
=550.
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