Think OneThink One

If 1 and ½ woodchucks can If 1 and ½ woodchucks can chuck 1 and 1/3 cords of wood in chuck 1 and 1/3 cords of wood in 1 and ¼ hours, how many cords 1 and ¼ hours, how many cords of wood can 1 woodchuck chuck of wood can 1 woodchuck chuck

in 1 hour?in 1 hour?

PATTERNS, SEQUENCES, PATTERNS, SEQUENCES, and FUNCTION MACHINESand FUNCTION MACHINES

Look for a pattern and find the Look for a pattern and find the missing number missing number xx. .

3 2 4 83 2 4 87 2 1 37 2 1 38 4 8 4 xx 5 54 3 6 94 3 6 9

A lily pad grows so that each day A lily pad grows so that each day it doubles its size. On the 20it doubles its size. On the 20thth

day of its life, it completely covers day of its life, it completely covers the pond. On what day of its life the pond. On what day of its life

was the pond half covered?was the pond half covered?

VENN DIAGRAMSVENN DIAGRAMS

In a school that has 20 teachers, In a school that has 20 teachers, 10 teach humanities, 8 teach 10 teach humanities, 8 teach social studies, and 6 teach social studies, and 6 teach science. Two teach both science. Two teach both

humanities and social studies, humanities and social studies, but none teaches both social but none teaches both social

studies and science. How many studies and science. How many teach both humanities and teach both humanities and

science?science?

Mental MathMental Math

Mental MathMental Math

Add from the leftAdd from the left

462 + 210462 + 210

33.6 + 12.533.6 + 12.5

65.8 + 12.265.8 + 12.2

Mental MathMental Math

Break and BridgeBreak and Bridge

74 + 1974 + 191.5 + 2.6 + 3.71.5 + 2.6 + 3.714 + 17 + 3414 + 17 + 34

Subtracting from the leftSubtracting from the left

Need regroupingNeed regrouping

Don’t need regroupingDon’t need regrouping

Don’t need regroupingDon’t need regrouping

9154 – 50149154 – 5014

4.75 – 1.324.75 – 1.32

89.67 – 35.4089.67 – 35.40

Need regroupingNeed regrouping

45 – 27 45 – 27

627 – 418627 – 418

9.45 – 3.469.45 – 3.46