Use your brain to calculate 25 × 37 × 4 125 × 7 × 8 25 × 43 × 8 77 × 50 × 6

Use your brain to calculate 25 × 37 × 4 125 × 7 × 8 25 × 43 × 8 77 × 50 × 6


(1)25×37×4,=25×4×37,=100×37,=3700;(2)125×7×8,=125×8×7,=1000×7,=7000;(3)25×43×8,=25×8×43,=200×43,=8600;(4)77×50×6,=77×(50×6),=77×300,=23100.



Simple calculation method of 16 * 4 + 16 * 6 * 16


16 squared * 10



Calculation: 1 + 3-2 + 2 + 4-3 + 3 + 5-4 + 4 + 6-5 + +36+38-37=______ .


1+3-2+2+4-3+3+5-4+4+6-5+… +36+38-37,=1+2+3+4+5+6+… +37+38-37-2,=1+2+3+4+5+6+… +36 + 37 + 38-39, = (1 + 38) × 38 △ 2-39, = 741-39, = 702