如题所述
第1个回答 2018-07-12
(1)128+35×3, =128+105, =233; (2)700-125×3, =700-375, =325; (3)330÷5+46×7, =66+322, =388; (4)(210+630)÷7, =840÷7, =120; (5)145-150÷2+23, =145-75+23, =70+23, =93; (6)560÷4-630÷7, =140-90, =50; (7)12×(280-80÷4), =12×(280-20), =12×260, =3120; (8)38.7÷9-66.8÷40, =4.3-1.67, =2.63; (9)(135+55)÷(15-7), =190÷8, =23.75; (10)4.5+5.5÷5-3.42, =4.5+1.1-3.42, =5.6-3.42, =2.18; (11)26×4-425÷5, =104-85, =19; (12)(100-51)÷0.07, =49÷0.07, =700; (13)(37×15-55)×8, =(555-55)×8, =500×8, =4000; (14)(445÷5+172)×18, =(89+172)×18, =261×18, =4698; (15)300-(76+40×3), =300-(76+120), =300-196, =104; (16)8.9×200-1.2÷0.06, =1780-20, =1760; (17)522÷(328-319)+42, =522÷9+42, =58+42, =100; (18)8 9 +1 18 +1 2 , =17 18 +1 2 , =13 9 ; (19)1-5 6 +1 7 , =1 6 +1 7 , =13 42 .本回答被网友采纳
第2个回答 2018-07-12
这道题这样算。
因为35×7×5,
所以结果是7×(145-5×3×3)=700追答
因为35×7×5,
所以结果是7×(145-5×3×3)=700追答
35=7×5
第3个回答 2018-07-12
啥意思?
145x7=(150-5)x7=1050-35=1015
35x3x3=35x(10-1)=350-35=315
这样?
145x7=(150-5)x7=1050-35=1015
35x3x3=35x(10-1)=350-35=315
这样?