37 * 75 + 125 * 45 =? Simple calculation

37 * 75 + 125 * 45 =? Simple calculation

37*75+125*45
=37*(100-25)+(100+25)*45
=3700-37*25+4500+45*25
=8200+(45-37)*25
=8200+8*25
=8400

How to calculate 88 times 99 simply? I'm so anxious that I have to hand in my homework tomorrow!

88*99
=88*(100-1)
=8800-88
=8712

Using the operation law of rational number addition to carry out simple operation and other problems
(1) Calculation: - 2.4 + (- 3.7) + (- 4.6) + 5.7
Original form=
=
(2) Calculation by simple method: - 1 / 3 + 13 + (- 2 / 3) + 17
Original form=
=
(3) Xiao Ming's mother is a vegetable dealer. One day, her mother went to the market and bought 8 baskets of vegetables. The weight is as follows (unit: kg)
53 44 54 52 49 46 45 46
Can you help mother Xiao Ming calculate the total weight of these dishes? Write down your practice
These are some of the topics in total learning
I have to hand in my homework tomorrow

(1) Calculation: - 2.4 + (- 3.7) + (- 4.6) + 5.7 original formula = - 2.4-4.6 + 5.7-3.7 = - 7 + 2 = - 5 (2) simple calculation: - 1 / 3 + 13 + (- 2 / 3) + 17 original formula = 13 + 17 - (1 / 3 + 2 / 3) = 30-1

How to calculate 1 * 2 * 3 / 1 + 2 * 3 * 4 / 1 + 3 * 4 * 5 / 1 +. + 48 * 49 * 50 / 1

Are you sure the title is correct? / 1 it doesn't seem necessary, or you write it upside down