甲数是7.18,比乙数少3.6,甲、乙两数的和是多少?
用递等式计算.(能简算的要写出简算过程)(1)1.25×3.2×0.25 (2)6.4×0.27+3.6×0.27(3)3.84﹣0.84×5÷1.5 (4)2.5×0.99(5)8.19+0.5×(4.36﹣2.74) (6)1.8×2.48+1.52×1.8﹣0.5(7)[(6﹣4.2)×2.5]÷2.5×1 (8)4.02÷[(1﹣0.4)÷0.1].
37.2×99+37.2= 25×4÷0.25×4= 0.9×7+10.7=9÷5﹣1.9÷5﹦ 6.8﹣2.4÷3= 0.6÷0.3+0.5=1.9+5.1÷51= 12﹣0.05×4= 1.8÷0.9×0.5=1×0.01÷0.1= 7.2﹣1.2+6.7=
计算.(怎样简便怎样算).5.64﹣2.4÷0.48 12.8+10.8÷45 13.2÷8÷1.25(70.8﹣67.55)÷0.25 1.63+4.19+2.37 2.16×5.6+4.4×2.16.
怎样简便怎样算.(1)0.625×(8.3﹣2.5×0.12) (2)3÷﹣÷3 (3)3098+3098×99(4)6.3×8.7+8.7×3.7 (5)2.5×1.25×32 (6)﹣﹣.
能简便的要简便计算2.9×1.4+2×0.16 200﹣(3.05+7.1)×18 2.5×32×1.25(2.44﹣1.8)÷0.4×20 48×10.1 3.2×19+3.2.