8+2-用简便方法计算=2--8 ( )
32×32+32=32×32 ( )
34×3535-35×3434 27000÷125345345÷15015 347+358+352+349
67×21+18×21+85×79 321×81+321×19
210÷42×6 39600÷25
150×40÷50 5600÷(25×7)
25×16×125 13×99
4.9×5+4.9+4.9×3
4.13×2.3+4. 13×7.7
5.6×0.375+×5.4-0.375×0.9
简算题 2681﹣406; (4+2)×2.4.
口算。3-= -= 6÷= (+)×21313×89= 0.9×99+0.9= 1-+=2.3+ 3.57= 0.5×(2.6-2.4)= 0.25×4÷0.25×4=
( +一)×48
3.6×0.25×4=
简便计算25×28=( ) A.25×20×8B.25×20+8C.25×4×7