四上简便计算和答案.doc

1.45+15×6=?135? 2.250÷5×8=400? 3.6×5÷2×4=60? 4.30×3+8=98? 5.400÷4+20×5=?200? 6.10+12÷3+20=34? 7.(80÷20+80)÷4=21? 8.70+(100-10×5)=120? 9.360÷40+10=?19? 10.40×20-200=?600? 11.（80-25）*2=?110? 12.70+45=115? 13.90×2÷3=?60? 14.16×6÷3=?32? 15.300×6÷9=?200? 16.540÷9×7=420? 17.30×20÷15=?20? 18.400÷4×7=?700? 19.（350-80）÷9=?30? 20.160+70+50=280? 21.18-64÷8=?10? 22.42÷6+20=27? 23.40-5×7=?5? 24.80+60÷3=100? 25.41+18÷2=?50? 26.75-11×5=?20? 27.42+7-29=?20? 28.5600÷80=70? 29.25×16÷4=?100? 30.120×25÷5=?600? 31.36×11÷3=?132? 32.1025÷25×8=328? 33.336+70-6=?400? 34.25×9×4=?900? 35.200-33×3=?101? 36.3020-1010=2010? 37.12×50+10=?610? 38.25×8+199=?399? 39.23×11-13=?240? 40.125÷25-5=0? 41.4200-2200+200=2200? 42.220+80-150=150? 43.20×8×5=?800? 44.600-3×200=0? 45.20+20÷2=?30? 46.35-25÷5=?30? 47.36+8-40=?4? 1.?3/7?×?49/9?-?4/3=7/3-4/3=3/3=1 2.?8/9?×?15/36?+?1/27=10/27+1/27=11/27 3.?12×?5/6?–?2/9?×3=10-2/3=30/3-2/3=28/3 4.?8×?5/4?+?1/4=10+1/4=40/4+1/4=41/4 5.?6÷?3/8?–?3/8?÷6=6*8/3-3/8*1/6=16-1/16=155/16 6.?4/7?×?5/9?+?3/7?×?5/9=1/7*（4*5/9+3）=1/7*47/9=47/63 7.?5/2?-（?3/2?+?4/5?）=5/2-3/2-4/5=1-4/5=5/5-4/5=1/5 8.?7/8?+?（?1/8?+?1/9?）=7/8+1/8+1/9=1+1/9=10/9 9.?9?×?5/6?+?5/6=（9+1）*5/6=50/6 10.?3/4?×?8/9?-?1/3=（3/4*8/3-1）*1/3=1*1/3=1/3 11.?7?×?5/49?+?3/14=（7*5/7+3/2）*1/7=13/14 12.?6?×（?1/2?+?2/3?）=3+4=7 13.?8?×?4/5?+?8?×?11/5=8*（4/5+11/5）=8*3=24 14.?31?×?5/6?–?5/6=（31-1）*5/6=25 15.?9/7?-?（?2/7?–?10/21?）=9/7-2/7+10/21=1+10/21=31/21 408－12×24?=?408?-?288?=?120 ?（46＋28）×60?=?74?x?60?=?4440 ?42×50－17?=?2100-?17?=?2083 32＋105÷5?=?32?+?21?=?53 420×（327－238）?=?420?x?89?=?37380 (4121+2389)÷7?=?6510?÷7?=?930 3.416÷（0.016×35）?=?3.416?÷0.56?=?6.1 0.8×[(10－6.76)÷1.2]?=?0.8?x(3.24÷1.2)?=?0.8?x?2.7?=?2.16 5.67×0.2-0.62??=?1.134-0.62?=?0.514 0.4×0.7×0.25?=?0.4?x?0.25?x?0.7?=?0.1?x?0.7?=?0.07 0.78+5.436+1?=?6.216?+1?=?7.216 30.8÷[14－(9.85＋1.07)]??=?30.8?÷?(14?-?10.92)?=?30.8÷3.08?=?10 [60－(9.5＋28.9)]÷0.18??=?(60-?38.4)÷0.18?=?21.6?÷0.18?=?120 2.881÷0.43－0.24×3.5??=?6.7?-?0.24?x3.5?=?6.7?-?0.84?=?5.86 20×[(2.44－1.8)