Math Message 1. In math notebook solve & show work a. 46 + 37 b. 233 + 158 b. 233 + 158.

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Presentation transcript:

Math Message 1. In math notebook solve & show work a b b

Rule of Thumb Ballpark Estimates 1) Two-digit numbers – round to the nearest ten ex. 44 round to 40 ex. 44 round to 40 2) Three-digit number – round to the nearest hundred ex. 490 round to 500 ex. 490 round to 500 3) four-digit number- round to the nearest thousand ex. 5,890 round to 6,000 ex. 5,890 round to 6,000

Games The Sea Shell Rounding Activity Page The Sea Shell Rounding Activity Page The Sea Shell Rounding Activity Page The Sea Shell Rounding Activity Page Rounding Numbers Rounding Numbers Rounding Numbers Rounding Numbers Estimating a Sum Estimating a Sum Estimating a Sum Estimating a Sum FunBrain.com Math Baseball FunBrain.com Math Baseball FunBrain.com Math Baseball FunBrain.com Math Baseball

Math Journal Page 42 only ballpark estimates Page 42 only ballpark estimates

Math Journal Page 42 1) = 120

Math Journal Page 42 2) = 1,500

Math Journal Page 42 3) 1, , 000 = 4, 000

Math Journal Page 42 4) = 100

Math Journal Page 42 5) = 1,300

Math Journal Page 42 6) 8, , 000 = 13,000

Math Journal Page 43 only ballpark estimates Page 43 only ballpark estimates Work on Math Boxes Work on Math Boxes

High-Number Toss SRB page 252 SRB page 252