能简算的要简算。
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3/7 × 4/5 + 1/7
=3/7 × 4/5 + 1/7 ×5/5
=3×4/7×5 + 1×5 / 7×5
=12/35 +5/35
=17/35
5/7 + 5/7 ×6
=5/7×(1+6)
=5/7×7
=5
17/5 × 1/34 ×18
=17×1×18 / 5×34
=17×1×2×9 / 5×2×17
=9/5
3/4 × 3/8 + 5/8 × 3/4
=9/32 + 15/32
=24/32
=3×8 / 4×8
=3/4
5/9 × 3/4 + 5/9× 1/4
=5×3/9×4 +5×1/9×4
=15/36 + 5/36
=20/36
=5/9
(3/4 +5/8)×32
=(3×8/4×8 + 5×4/8×4)×32
=(24/32+20/32) × 32
=24+20
=44
=3/7 × 4/5 + 1/7 ×5/5
=3×4/7×5 + 1×5 / 7×5
=12/35 +5/35
=17/35
5/7 + 5/7 ×6
=5/7×(1+6)
=5/7×7
=5
17/5 × 1/34 ×18
=17×1×18 / 5×34
=17×1×2×9 / 5×2×17
=9/5
3/4 × 3/8 + 5/8 × 3/4
=9/32 + 15/32
=24/32
=3×8 / 4×8
=3/4
5/9 × 3/4 + 5/9× 1/4
=5×3/9×4 +5×1/9×4
=15/36 + 5/36
=20/36
=5/9
(3/4 +5/8)×32
=(3×8/4×8 + 5×4/8×4)×32
=(24/32+20/32) × 32
=24+20
=44
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