77*3/79=
77*3/79= -
77*3/79 =(79-2)×3/79 =79×3/79-2×3/79 =3-6/79 =2又73/79
=(79-1)乘79分之3 =79乘79分之3-1乘79分之3 =3减79分之3 =2又79分之77
77*3/79 =(79-2)×3/79 =79×3/79-2×3/79 =3-6/79 =2又73/79
=(79-1)乘79分之3 =79乘79分之3-1乘79分之3 =3减79分之3 =2又79分之77
简便计算:78×79分之78 2008×2007分之200 78×79分之78=(79-1)×78/79=79×78/79-78/79=78-78/79=77又1/79。 2008×2007分之200=(2007+1)×200/2007 =2007×200/2007+200/2007=200+200/2007=200又200/2007。80×79分之43脱式计算 80×79分之43 =(79+1)×79分之4希望你能满意。
你好,经过约分之后的结果分别是:28分之17 4分之3 5分之2 7分之2 7分之9 16分之3 12分之25 希望可以帮助你。
七十九乘八十分之三简便运算? -
七十九乘八十分之三简便运算过程如下:79×3/80 =(80-1)×3/80 =80×3/80-1×3/80 =3-3/80 =2又77/80×××
78╳5/77=(77+1)╳5/77=5+5/77 79╳3/80=(80-1)╳3/80=3-3/80
77×55+77×46-77的简便计算 -
77乘1001减77的简便计算 77×1001-77 =77×1001-1×77 =77×(1001-1) =77×1000 =77000 77乘83加77乘17=简便计算 77乘83加77乘17=简便计算 =77x(83+17) =77x100 =7700 79×8 4×77-2×77的简便计算 79×8+4×77-2×77 =(2+77)x8+(4-2)x77 =2x8+还有呢?
77 * 68 = 523677 * 69 = 531377 * 70 = 539077 * 71 = 546777 * 72 = 554477 * 73 = 562177 * 74 = 569877 * 75 = 577577 * 76 = 585277 * 77 = 592977 * 78 = 600677 * 79 = 608377 * 80 = 616077 * 81 = 623777 * 82 = 631477 * 83 = 639177 * 84 = 646877到此结束了?。
小学的数学题,求大神解答呦, -
9x=11×7 9x=77 x=77/9 2x=0.8×1.6 x=0.4×1.6 x=0.64 1/8x=1/30 x=8/30 x=4/15 4.9x=0.7 x=1/7 0.25x=0.4×6 0.25x=2.4 x=2.4×4 x=9.6 2/7×1/3=1/2×4x 2x=2/21 x=1/21
78╳5/77=(77+1)╳5/77=5+5/77 79╳3/80=(80-1)╳3/80=3-3/80