7.8 + 2.5 × 7.8 × 4 by simple method It's for tonight

7.8+2.5×7.8×4
=7.8×(1+2.5×4)
=7.8×11
=85.8

A simple method is used to calculate: 35 and 11 / 23 * 1 / 34 =?

Divide 35 into (34 + 1), and then use the distribution law
35 and 11 / 23 * 1 / 34
=(34 and 34 / 23) * 1 / 34
=(34+34/23）*1/34
=34*1/34+34/23*1/34
=1+1/23
=24/23

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