四年级数学下册四则混合运算练习二

1、四年级数学下册四则混合运算练习二1、口算。12分347- 147= 25X4= 567 -77= 245+155=20X5= 13X7= 75+3= 125X8=2X25X4= 27+33+51= 8 X 125 X 11= 75 X 2=2、把得数相等的式子用线连起来。8分125X(4+8) 125 X32401X25 125 X 4+125X8125 8 4 400 25+25123-(23+75) 123-23-753、怎样简便怎样计算。24分58 58+58 42 3874 -(874+1000)329-38-62 347-129-1476000+125+ 8 25 X 125X329

2、5X102 360-45三、计算。78 X 50 -1440 12 3856 + 16+85X 164000+ (16+832-13) (326+95 X25)-37(7236 - 18-228) X28 (4275 -24X75)-25178- 145+5X6+42 420+580 -64X21 - 28812- 700+(9+31 X11)50+160+ 40=54 120 -144+18+35=147 (58+37)+(64 -9X5)95+(64 -45) 178- 145+5X6+42 120 -36X4+18+3585+14X (14+208 - 26) 21+(327 - 23)

3、 + 19=539-513+(378 + 14)=34- 3094+ 17+13= 19+(253 - 22) + 21= 50+20 X 28 -42= (23+23) X 24-597= (110- 10)+10-10= 45- 24+14X 14= 304- 275 (275 25)= (70+10)(18 -10)=120-12X18 -54=44+16X 15-32= (10- 100-10)X1 1= (53- 588-21)X36= (60+10) + (17 -10)= 17+(233- 43) + 10= 100 -10X 10 -60= 424-475+19X 16= 22

4、+(374 -10)+26= (245 -11)+18-11 = 22- (10+100 + 10)= (252 -14) + 17-10= 35- 13+10X 15= (346- 10)+16-12= 215- 198+(121 +11)=(45- 651 - 21) X33=19+192-12-10= 572 +22X23 -158= 19+56- 1224+34=(714- 12)+27-19= 14+(21- 19)X14= 18 -(13+15)+262= 736+(43 -20)X23= (227+11) +(31 -14)= 36+19 X14 -23= 828-23X 12

5、-48= 18- 15+10X 18= (31 -154-11)X12=(1369- 37)+37-32= 160 + (22 -12) X22= 357 + 21X13 -213= 985-728+26X 35= (438 -39)+21-12= (20+18) X 11 -239= 50+160 40 (58+370)(64 -45) 120- 144 18+35 =五、计算。1、直接写生得数（11分）12+88= 25X8= 100 -35- 25= 1000 + 125=65+35= 8 X 125= 235 - (35+27)= 300 + (25 X 4)=37+63+98= 23 X 99+23= 725+90 -25=2、怎样简便就怎样计算(35分)。355+260+1