五年級上冊數(shù)學歷年期末簡便計算專項練習

五年級上冊數(shù)學歷年期末簡便計算專項練習2.56÷25÷0.4=2.56÷（25×0.4）=2.56÷10=0.25616.12×99＋16.12=16.12×（99＋1）=16.12×100=16124.5×75-4.5×65=4.5×（75-65）=4.5×10=456.9×9+6.9=6.9×（9+1）=6.9×10=690.48÷1.5÷0.08=0.48÷（1.5×0.08）=0.48÷0.12=47.3×91.6+2.7×91.6=（7.3+2.7）×91.6=10×91.6=9167.8÷0.25÷4=7.8÷（0.25×4）=7.8÷1=7.80.86×6.8-5.8×0.86=0.86×（6.8-5.8）=0.86×1=0.861.37×99=1.37×（100-1）=1.37×100-1.37=137-1.37=135.6378÷0.25÷0.4=78÷（0.25×0.4）=78÷0.1=7805.01-1.9+4.99=5.01+4.99-1.9=10-1.9=8.125×0.69×0.4=25×0.4×0.69=10×0.69=6.90.25×0.58×40＝0.25×40×0.58＝10×0.58＝5.80.37×99+0.37=0.37×99+0.37×1=0.37×（99+1）=0.37×100=376.28×7.5+6.28×2.5＝6.28×（7.5+2.5）＝6.28×10＝62.8五年級上冊數(shù)學歷年期末簡便計算專項練習17.8×99＝17.8×（100﹣1）＝17.8×100﹣17.8＝1780﹣17.8＝1762.24.6×2.8+2.8×5.4=2.8×（4.6+5.4）=2.8×10=284.2×7.8+22×0.42=4.2×7.8+2.2×4.2=4.2×（7.8+2.2）=4.2×10=429.8×4.3=（10-0.2）×4.3=10×4.3-0.2×4.3=43-0.86=42.142.5×1.6×4×5=2.5×4×1.6×5=10×1.6×5=16×5=8018.75×0.125×8=18.75×(0.125×8)=18.75×1=18.7562×0.98=62×（1-0.02）=62×1-62×0.02=62-1.24=60.766.3×103-0.63×30=6.3×103-6.3×3=6.3×（103-3）=6.3×100=6300.78×98=0.78×（100-2）=0.78×100-0.78×2=78-1.56=76.443.4÷12.5÷0.8=3.4÷（12.5×0.8）=3.4÷10=0.349.8×23=（10-0.2）×23=10×23-0.2×23=230-4.6=225.45.5×16.3+0.37×55=55×1.63+0.37×55=55×（1.63+0.37）=55×2=110五年級上冊數(shù)學歷年期末簡便計算專項練習12.57－（3.57＋3.5）=12.57-3.57-3.5=9-3.5=5.59.4×2.5＋7.5×9.4=9.4×(2.5+7.5)=9.4×10=9412÷1.25÷0.08=12÷（1.25×0.08）=12÷0.1=1202.37×6.3+2.37×3.7=2.37×（6.3+3.7）=2.37×10=23.74.21×101-4.21=4.21×（101-1）=4.21×100=4210.47÷0.25÷0.4=0.47÷（0.25×0.4）=0.47+0.1=4.78.8×1.25=1.1×8×1.25=1.1×10=111.58×99+1.58＝1.58×（99+1）＝1.58×100＝1580.8×6.3﹣0.8×3.8＝0.8×（6.3﹣3.8）＝0.8×2.5＝212.5×0.7+1.25=1.25×（7+1）=1.25×8=106.73-4.6-1.73=6.73-1.73-4.6=5-4.6=0.42.73×101=2.73×（100+1）=2.73×100+2.73=275.736.7×5.5＋5.5×17.3=（6.7＋17.3