Two diagrams. Each squares. Length and width, 1. Each partitioned into 10 rows of 10 of the same size squares. On left, 20 squares shaded. On right, 90 squares shaded.
Two diagrams. Each squares. Length and width, 1. Each partitioned into 10 rows of 10 of the same size squares. On left, 95 squares shaded. On right, 7 squares shaded.
Two diagrams. Each squares. Length and width, 1. Each partitioned into 10 rows of 10 of the same size squares. On left, 20 squares shaded. On right, 9 squares shaded.
Activity 1
The Sum
Find the value of the expression. Show your thinking. Organize your work so it can be followed by others. Use diagrams if they are helpful.
What questions do you have about adding decimals?
Activity 2
Introduce Target Numbers—Add Tenths or Hundredths
Directions:
Play 1 game of Target Numbers.
Take out the cards that show 0 and 10 and set them aside.
On your turn.
Start at 0. Pick a number card. Choose whether to add that number of tenths or hundredths to your starting number.
Write an equation to represent the sum.
The sum is the starting number in the next equation.
Take turns for 6 rounds.
The partner to get a sum closer to 1 without going over wins.
Describe a move that you could have made differently to change the outcome of the game.
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