四则混合运算(1)1: 789+960÷15X13 =789+832 =1621 16X45-735÷21 =720-35 =685 666÷(901-32X27) =666÷(901-864) =666÷37 =18 909×[﹙118+602﹚÷80] =909×[720÷80] =909X9 =8181 (1/2+1/6)X(1/3-1/4) =2/3X1/12 =1/183/5÷[3/8×(4/15+2/5 =3/5÷[3/8X2/3] =3/5÷1/4 =12/5【请关注零五网:https://www.05wang.com/】 2: 48+169+52 =48+52+169 =100+169 =269 25X73X0.4 =25X0.4X73 =10X73 =730 43X102 =43X(100+2) =43X100+43X2 =4300+86 =4386 4/9+3/17+5/9+4/17 =(4/9+5/9)+(3/17+4/17) =1+7/17 =24/17 7/18x5/4+11/18÷4/5 =7/18x5/4+11/18x5/4 =5/4x(7/18+11/18) =5/4x1 =5/43: 315-(79+15) =315-15-79 =300-79 =221 45x0.99 =45x(1-0.01) =45x1-45x0.01 =45-0.45 =44.55 25x25x16 =(25x4)x(25x4) =10 |