1. There are 7228 white balloons, 946 black balloons, and red balloons in bags.Eatimate the total number balls in the bag.
2.List all the number which are rounded off to the nearest tens as 550.
3.Simplify:
(a) 9+45-(7+4)*6 divide 3
(b) (36divide9)4*7+6-13
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Answer:8200
Step-by-step explanation: add this boring turns and estimate it on thousand place
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