Lesson 24: Easy abacus addition and subtraction test
Level 2, Easy Street. 10 sums and 3 in your head. Get 10 right for the Street Lamp sticker.
What your child does, card by card
Easy Street test. Show what you know! PlayType opens the lesson: “Test time. No hints. Show what you know.”
The test: 10 tasks with no ring and no help, one try each: your child must work out 2 + 2, 3 + 5, 4 - 3, 9 - 5, 1 + 7, 8 - 6, 32 + 51, 78 - 25, 50 + 34 and 97 - 62. A count shows which task this is.
Then the beads hide and the sums 2 + 5, 8 - 5 and 23 + 22 are done in the head, the answer picked from 3, 7, 45 and 54.
You passed! Easy Street is done. Next: Small Friends Pond!
What this lesson trains
13 answers, roughly five minutes: 17 moves of the beads, 7 of them with the top bead and 10 with bottom beads. The largest is 97: tens and ones. Then 3 quick looks in your head.
Fingers and hands
Below the abacus the drawn hands show zero and 1, 2, 3, 4, 8, 9, 32, 35, 50, 53, 78, 83, 84 and 97 here, finger for bead: the left hand counts the tens, the right hand the ones.
What PlayBuddy and PlayType say
PlayType: “Test time. No hints. Show what you know.”
PlayBuddy: “Click Let's Begin, or press Enter!”
PlayBuddy: “Here comes the last one.”
PlayType: “Now do it in your head.”
The test and its sticker
13 answers, one try each, with no green ring and no help. 10 or more right give the Street Lamp sticker; fewer, and PlayBuddy says “Not yet. One more try and you've got this!” and Play again glows. Nothing earned before is taken away.