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68x62Xx52怎么巧算

((5 × 3) 3) 6 60: 6 (3 3 × 5) 86: 5 × 3 (3 6) 61: ((3 × 5) 3) 6 21: 3 × ((6 5) - 3) 53: 3 (6 5 × 3) 48: (5 × 6) - (3 3) 79: (3 × 5) 3 6 19: (5 - 3 6) × 3 66: 6 × (3 × 3 - 5) 91: 3 × (5 (6 - 3)) 36: 3 × (6 - (3 - 5)) 45: (5 (6 -...

62x(2050÷25-38) =62x(82-38) =62x44 =62x40+62x4 =2480+248 =2728 望采纳

3.14×62.5-3.14-3.14×28.5 =3.14×(62.5-1+28.5) =3.14×90 =282.6

37x125x(62-54)=37x125x8=37x5x2x5x2x5x2=37x1000=37000

0.98x0.62 =0.62×(1-0.02) =0.62-0.0124 =0.6076

=240*62+62*10*76 =62(240+760) =62*1000=62000

=(60+8)×(60+2)-(60-2)×(60-8) =(60×60+60×2+8×60+8×2)-(60×60-60×8-2×60+8×2) =60×60+60×2+8×60+8×2-60×60+60×8+2×60-8×2 =60×2+8×60+60×8+2×60 =60×(2+8)×2 =60×10×2 =1200

69x78+39x62 =69x78+78x31 =(69+31)x78 =100x78 =7800

=48x62+(1+37)x88=48x62+38x38=2976+7744=10720

62×34+38×20+38×14 原式=62×34+(38×20+38×14) =62×34+38×(20+14) =62×34+38×34 =(62+38)×34 =100×34 =3400

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