1年目欠番問題 - 足し算
Missing Number Word Problems
不明な数値 (欠落部分、欠落加数)。グレード1
不足している加算: 子供向けの不足している部分を見つける
What's the Missing Number? [10-20 Version] (Can you figure out the MISSING number?)
Year 1/2 Missing Number Addition
Year 1 Missing number problems including subtraction
足りない数字を見つける (引き算)
Algebra: Missing number problems
MISSING NUMBER WORD PROBLEMS
1 年生の数学、レッスン 38、足りないものは何ですか? (未知を変更し、未知の方程式を開始)
Level 1 Missing Number Equations (add and subtract using 1 digit numbers)
Make It True Missing Number Addition Subtraction Worksheet
Solving Missing Number Word Problems
Word Problems (Finding the missing number)
WORD PROBLEMS: MISSING NUMBERS IN OPEN SENTENCES.
Year 3 Lesson: Single-Digit Missing Numbers
Solving for the missing number in a word problem
Missing numbers in the addition part-1
My Math Word Problem Journal - Part-Whole Missing Addend